申请人:Kaneka Corporation
公开号:EP1209234A1
公开(公告)日:2002-05-29
The present invention reveals the stereostructure of decarbamylase by X-ray crystallography and provides a decarbamylase mutant, which is more useful for industrial applications, obtained by molecular design utilizing the stereostructure for the purpose of improving the reactivity of decarbamylase to D-N-carbamoyl-α-amino acid which is a substrate thereof. Specifically, the present invention relates to the stereostructure of decarbamylase determined by X-ray crystallography; a stereostructure model of a decarbamylase mutant; a stereostructure model of a complex thereof with a substrate, a product, and the like; a molecular design method utilizing these stereostructures; a decarbamylase mutant obtained by the method; and a method for designing and producing a protein mutant having a structure similar to that of decarbamylase.
本发明通过X射线晶体学揭示了脱氨基甲酰酶的立体结构,并提供了一种脱氨基甲酰酶突变体,该突变体通过利用该立体结构进行分子设计而获得,更有利于工业应用,其目的是提高脱氨基甲酰酶对作为其底物的D-N-氨基甲酰-α-氨基酸的反应活性。具体而言,本发明涉及通过 X 射线晶体学确定的脱氨基甲酰酶的立体结构;脱氨基甲酰酶突变体的立体结构模型;其与底物、产物等的复合物的立体结构模型;利用这些立体结构的分子设计方法;通过该方法获得的脱氨基甲酰酶突变体;以及设计和生产具有与脱氨基甲酰酶相似结构的蛋白质突变体的方法。